Chileanthicus matthewsi, Kejval, 2009

Kejval, Zbyněk, 2009, Taxonomic revision of the genus Chileanthicus Werner (Coleoptera: Anthicidae) 2180, Zootaxa 2180 (1), pp. 1-82 : 62-63

Chileanthicus matthewsi sp. nov.

( Figs 166–170 )

Type locality. Australia, South Australia, 10 km WSW of Johnson Bore, Anna Creek Station , 29°34'36''S 136°07'51''E .

Description (male, holotype). Head and pronotum unicoloured rufous brown; elytra rufous, with conspicuous black marking ( Fig. 166 ), not touching lateral margins; legs, antennae and palpi rufous, antennae slightly darker.

Head 1.3 times as long as wide, somewhat unevenly rounded posteriorly; tempora subparallel, posterior temporal angles rounded, at most slightly indicated. Dorsal surface moderately glossy, distinctly punctured ( Fig. 166 ); punctation double, but fine punctures at places less numerous and thus less distinct; punctures somewhat sparser medially, but impunctate median line less distinct. Setation short, subdecumbent, with a few, moderately longer, erect setae. Antennae only slightly enlarged in apical third; antennomere III nearly twice as long as wide, as long as IV; antennomere X 1.5 times, XI 2.3 times as long as wide.

Pronotum 1.1 times as long as wide, slightly wider than head including eyes, unevenly, moderately widely rounded anteriorly. Pronotal disc distinct, its lateral margins forming rather rounded edge, lateral outlines nearly straightly narrowing posteriad. Dorsal surface moderately glossy, distinctly punctured; punctation as on head, rather evenly developed. Setation as on head.

Elytra 1.8 times as long as wide, conjointly rounded apically. Surface glossy, distinctly punctured ( Fig. 166 ); punctation simple, sparser and finer than that on head. Setation generally somewhat longer than on head; subdecumbent setae uniformly pale coloured, evenly directed posteriad (no setose bands); erect setae more numerous, longer and rather distinct in apical third.

Metafemora unidentate ( Fig. 167 ), subapical process wide basally, strongly narrowed and pointed apically, obliquely projecting, facing inner side of tibia; mesotibiae with small denticle on inner side apically; metatibia with rather distinct, pointed tooth-like process on inner side apically ( Fig. 168 ). Setation rather uniformly short and fine.

Abdominal sternum VII simple, slightly produced, with rounded apical margin. Tergum VII simple. Sternite VIII ( Fig. 169 ); paired prongs convergent, angulately dilated both on median and lateral side in distal half, from this place narrowing towards blunt apex; surface of prongs sparsely setose, with some longer setae on median dilatation. Tergite VIII evenly rounded posteriorly.

Aedeagus ( Fig. 170 ); apical portion of tegmen twice as long as basal-piece, simple, with narrowed and bluntly pointed apex; median lobe with simple, membranous apex.

Female. Unknown.

Body length (♂). 3.6 mm.

Type material. Holotype: ♂, S.AUST. Anna Ck Stn. 10km WSW Johnson Bore 29°34‘36“S 136°07‘51“E pitfalls 2-6 Oct, 1995 Stony Desert survey NC008 // S.Aust. Museum specimen ( SAMA).

Differential diagnosis. C. matthewsi sp. nov. is rather isolated among the Australian species in having a largely pale coloured body with black markings on the elytra, which are rather glossy, simply and sparsely punctured, and setose. Moreover, it can be easily recognized by the male characters ( Figs 168–170 ).

Etymology. Dedicated to Eric Matthews (SAMA).

Distribution. Australia (South Australia).

Figures

FIGURES 160–170: Chileanthicus mastersii (King), male, lectotype: 160, body form and punctation of head (top) and elytra (bottom); 161, metafemur; 162, sternite VIII; 163, segment IX (spiculum); 164, aedeagus in ventral (right) and lateral (left) view; 165, apical portion of aedeagus in ventral view; C. matthewsi sp. nov., male, holotype: 166, body form and punctation of head (top) and elytra (bottom); 167, metafemur; 168, apex of metatibia; 169, sternite VIII; 170, apex of aedeagus in ventral (right) and lateral (left) view. Scale (1.0 mm): A, 160; B, 161, 166; C, 164, 167; (0.5 mm): C, 168; D, 163; (0.2 mm): D, 170; E, 162, 165; F, 169.